Marine turbine.



G. WESTINGHOUSE. MARINE TURBINE;

APB. 13,1906. RENEWED APR. 20, 1908.

Patented ov. 30, 1909;

APPLIOA'I'ION FILED WITNESSES.-

21 rrokzwfk iuuo.

GEORGE WESTINGHOUSEOF PITTSBUR-G, PENNSYLVANIA.

MARIN-E TURBINE.

To all whom it may concern:

Be it known that I, Grouse WESTING- HOUSE, a citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Marine Turbines, of which the following is a specification.

This invention relates to elastic fluid turbines and more particularly to marine or reversing turbines.

The object of this inventionis the production of a simple and efficient reversing or marine turbine.

This and other objects I attain in a turbine embed ing the features herein described and illustrated in the single sheet of drawings accompanying this application, in which a partial longitudinal section of a turbine embodying my invention is shown.

The turbine. illustrated, as embodying my invention, is of the axial flow, multistage type and employs, for the purpose of balancing the longitudinal thrust, a divided lowpressure stage, the separate portions of which are arrangedat opposite ends of the turbine and through which the motive fluid dischar ed. from the high-pressure stage or stages ows in opposite directions.

The turbine comprises a stationary casing 2, which is provided with a suitable admission port (not shown) and exhaust ports 3,

located at either end of the turbine.

A rotor element- 4:, which is carried on a shaft 5, comprises two drums 6, located near either end of the casing, and an intermediate drum 7, bolted or otherwise secured to the web portions of the drums 6.

A shaft 5 extends through either end of the casing and is provided with suitable bearings 8 and with suitable packing devices 9, which seal the joints between it and the casing.

. Annular rows of working. blades are mounted on the intermediate drum 7 and alternate with annular rows of stationary vanes, mounted on the casing. The motive fluid admitted to the turbine traverses the blades on the intermediate .drum 7 of the rotor and is discharged into a divided lowpressure stage, the blades 11 of which are mounted on the outer peripheries of the drums 6 and alternate with annular rows of vanes 12, mounted on the stationary casing.

A portion of the motive fluid from the working blades on the drum 7 is discharged.

Specification of iietters Patent. Application filed April 13, 1906, Serial No. 311,517. Renewed April 20,

blades 16 are mounted Patented Nov. so, 1909.

1908. Serial No. 428,144.

directly into a portion of the low-pressure stage and the remaining portion is caused to traverse .a passage through the interior of the drum 7 and is admitted to the other portion of the low-pressure stage through ports 13,-formed in the drum 7. The separate portions of the low-pressure stage communicate with exhaust chambers 15, which are located at either end of the turbine.

Annular rows of inwardlyextending on the inner face of the drum 6 in the exhaust chamber 15. The casing 2 is divided on a plane, (usually horizontal) passing through the axis of the shaft and is arranged to receive a substantially L-shaped bracket 17, which is secured to the casing and extends into the exhaust. passage 15. v

Rows of guide vanes 18, which interleave with. the annular rows of b ades 16, are mounted on the end of the racket 17 and a passage 19 is provided in bracket, one end of which communicates with a fluid-directing device or nozzle 20 and the other with an admission port 21 in thecasing 2. The casing 2 is provided with a slot 22, which extends around the lower half of the casing- Bracket 17 isv provided centrally with a portion adapted to fit the slot 22. The rotor is put in place in the lower half of the casing, the bracket 17 is inserted at one side between the rotor and the casing and is slid longitudinally of the slot 22 until the passage 19 registers with the port 21.

The nozzle 20 is adapted to convert the pressure energy of the motive fluid into Velocity energy which is abstracted by the moving rows of blades 16; and the rows of vanes 18 are adapted to receive the motive fluid discharged from one row of vanes and re-dir'ect and deliver it, in the most effective manner, to the next row of blades. The bracket 17, in conjunction with the fluiddirecting device 20, the blades 16 and the directingvanes 18, constitute a reversing or astern 'turbine; the fiuid passages and the blades 16 being arranged to rotate with the rotor element of the turbine in a reversing.

direction.

. One or more of the brackets 17 may be employed, or each bracket may be provided with a number-of nozzles and means,- automatic or otherwise, may be utilized for varying the number of eflectivenozzles on the amount of motive fluid supplieo to the passage 19.

While the ahead portion of the turbine is operating, the motive fluid supply to the passage 19 is shut off and since the blades 16 communicate with, or, more properly, are located in the exhaust chamber of the turbine, they present little or no resistance to rotation. When the turbine is reversing the passages, may be provided at the other end of the turbine.

It is apparent that the construction utilized in connection with the reversing portion of the turbine may be employed with single-flow machines or various types of turbines and I do not, therefore, wish to limit its application to multi-st-age, or even axial flow turbines.

What I claim is:

1. In an elastic fluid turbine, a stationary casing, a rotor inclosed within said casing, a plurality of rows of radially-extending blades mounted on the outerface .of said rotor, annular rows of inwardly-extending radial vanes mounted on the inner face of said casing and cooperating with said blades, a fluid admission port for delivering fluid to said outwardly-extending blades, an exhaust port and an exhaust chamber communicating therewith and receiving fluid from said blades,a plurality of annular rows of inwardly-extending radial blades mounted on the inner face of said rotor and located witl in said chamber, a bracket located on saiu casing within said chamber and provided with a fluid passage, a discharge nozzle conimunicating with said passage and a plurality of vanes arranged to cooperate with said reversing blades and a fluid admission port provided in said casing and communicating with the fluid passage of said bracket.

2. In-combination with the low pressure drum or section of an ahead turbine, an astern turbine of the impulse type, the moving blades of which are mounted within the drum of the ahead turbine and the interme diate uide vanes and nozzles of which are carrie by a segmental bracket secured to the casing.

8. In combination with the low pressure drum or section of an ahead turbine, an astcrn turbine of the impulse type, the moving blades of which are mounted within the drum of the ahead turbine and the intermediate guide vanes and nozzles of which are carried by a bracket movable axially and radially outward into place and secured to the casing.

4. In combination with the low pressure drum or section of an ahead turbine, an astern turbine of the impulse type, the moving blades of which are mounted within the drum of the ahead turbine and the intermediate guide vanes and nozzles of which are carried by a bracket extending partially around the inner circumference of the drum and secured to the casin In testimony whereo', I have hereunto subscribed my name this 7th day of April,

GEO. WESTINGHOUSE. \Vitnesses CHARLES IV. McGrmn, E. V. McCALLIs'rnR. 

